mirror of https://github.com/PentHertz/srsLTE.git
Fixed up the initialization of NAS context in IMSI attach request.
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7077530a29
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@ -476,7 +476,6 @@ nas::pack_authentication_reject(srslte::byte_buffer_t *reply_msg)
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{
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srslte::byte_buffer_t *nas_buffer = m_pool->allocate();
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//Setup initiating message
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LIBLTE_S1AP_S1AP_PDU_STRUCT tx_pdu;
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bzero(&tx_pdu, sizeof(LIBLTE_S1AP_S1AP_PDU_STRUCT));
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@ -358,12 +358,7 @@ s1ap_nas_transport::handle_nas_imsi_attach_request(uint32_t enb_ue_s1ap_id,
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uint8_t rand[16];
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uint8_t xres[8];
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nas nas_ctx;
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emm_ctx_t *emm_ctx = &nas_ctx.m_emm_ctx;
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ecm_ctx_t *ecm_ctx = &nas_ctx.m_ecm_ctx;
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sec_ctx_t *sec_ctx = &nas_ctx.m_sec_ctx;
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//Set UE's EMM context
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//Get UE's IMSI
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uint64_t imsi = 0;
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for(int i=0;i<=14;i++){
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imsi += attach_req.eps_mobile_id.imsi[i]*std::pow(10,14-i);
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@ -382,6 +377,13 @@ s1ap_nas_transport::handle_nas_imsi_attach_request(uint32_t enb_ue_s1ap_id,
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m_s1ap->delete_ue_ctx(imsi);
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}
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//Set UE's EMM context
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nas *nas_ctx = new nas;
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nas_ctx->init(m_s1ap, m_mme_gtpc, m_hss, m_s1ap->m_nas_log);
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emm_ctx_t *emm_ctx = &nas_ctx->m_emm_ctx;
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ecm_ctx_t *ecm_ctx = &nas_ctx->m_ecm_ctx;
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sec_ctx_t *sec_ctx = &nas_ctx->m_sec_ctx;
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//Save IMSI, MME UE S1AP Id and make sure UE is EMM_DEREGISTERED
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emm_ctx->imsi = imsi;
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emm_ctx->state = EMM_STATE_DEREGISTERED;
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@ -410,8 +412,8 @@ s1ap_nas_transport::handle_nas_imsi_attach_request(uint32_t enb_ue_s1ap_id,
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//Initialize E-RABs
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for (uint i = 0 ; i< MAX_ERABS_PER_UE; i++) {
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nas_ctx.m_esm_ctx[i].state = ERAB_DEACTIVATED;
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nas_ctx.m_esm_ctx[i].erab_id = i;
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nas_ctx->m_esm_ctx[i].state = ERAB_DEACTIVATED;
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nas_ctx->m_esm_ctx[i].erab_id = i;
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}
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//Log Attach Request information
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@ -438,9 +440,10 @@ s1ap_nas_transport::handle_nas_imsi_attach_request(uint32_t enb_ue_s1ap_id,
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emm_ctx->attach_type = attach_req.eps_attach_type;
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//Get Authentication Vectors from HSS
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if (!m_hss->gen_auth_info_answer(emm_ctx->imsi, sec_ctx->k_asme, autn, rand, sec_ctx->xres)) {
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if (!m_hss->gen_auth_info_answer(emm_ctx->imsi, sec_ctx->k_asme, sec_ctx->autn, sec_ctx->rand, sec_ctx->xres)) {
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m_s1ap_log->console("User not found. IMSI %015lu\n",emm_ctx->imsi);
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m_s1ap_log->info("User not found. IMSI %015lu\n",emm_ctx->imsi);
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delete nas_ctx;
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return false;
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}
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//Allocate eKSI for this authentication vector
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@ -448,14 +451,12 @@ s1ap_nas_transport::handle_nas_imsi_attach_request(uint32_t enb_ue_s1ap_id,
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sec_ctx->eksi=0;
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//Save the UE context
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nas *new_ctx = new nas;
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memcpy(new_ctx,&nas_ctx,sizeof(nas));
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m_s1ap->add_nas_ctx_to_imsi_map(new_ctx);
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m_s1ap->add_nas_ctx_to_mme_ue_s1ap_id_map(new_ctx);
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m_s1ap->add_nas_ctx_to_imsi_map(nas_ctx);
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m_s1ap->add_nas_ctx_to_mme_ue_s1ap_id_map(nas_ctx);
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m_s1ap->add_ue_to_enb_set(enb_sri->sinfo_assoc_id,ecm_ctx->mme_ue_s1ap_id);
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//Pack NAS Authentication Request in Downlink NAS Transport msg
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new_ctx->pack_authentication_request(reply_buffer);
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nas_ctx->pack_authentication_request(reply_buffer);
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//Send reply to eNB
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*reply_flag = true;
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